said by georgetown :
They won't or cant' diagnose it from the call centre. I don't think they can.
They can actually diagnose a lot of things from the Call Center but not this particular problem.
There is an incoming patch to solve some connectivity issues with D3, note that this is NOT on the modem side. (in fact, patch has already started to be deployed and will be done in a timely manner)
Sorry for any inconvenience.